Terahertz 2D Luneberg Lens Antennas Based on Meta Structure (Invited)

In this paper, aiming at the difficulties caused by the complexity and tolerances of the processing technology in terahertz band, we present a 2D Luneburg lens antenna for multiple beam applications. The proposed Luneberg lens antennas are designed based on parallel plate waveguide (PPW) technology with a meta structure sandwiched between two parallel plates. For this purpose, the meta structure, i.e., an array of metallic posts is designed and discussed. Within 110 GHz to 120GHz, the simulated results indicate that the reflection coefficients are below −10dB, the aperture efficiencies are greater than 66.7%, the realized gains are higher than 20.9 dBi, and the multiple beam scanning loss is better than −1.0 dB from −45° to +45°. The proposed 2D lenses are superior at its compact size, simpler assembling and more feasible fabrication process compared with conventional THz multibeam antennas, and therefore very promising for future THz applications.